00522nas a2200217   4500000000100000008004100001260001300042653001100055653000900066653001800075653002600093653001700119653001200136653001200148653002200160100001700182245007300199300001100272490000700283022001400290       1971                            d  c1971 Dec10aAfrica10aAsia10aHelminthiasis10aHistory, 20th Century10aInsecticides10aleprosy10aMalaria10aTropical Medicine1 aWoodruff A W00aAchievements in tropical medicine during the past twenty-five years.  a529-350 v25  a0007-0947